New texture loading tests, CCColor tests. 

Also minor fixes to the audio test and the particle tests.

Removal of test images that weren't being used. There were a lot of duplicates and buttons and things that weren't particularly going to ever be useful. I think it's possible to remove a few more, potentially.

Added a setUp method to the testBase that is run before each test. This mirrors the XCode Unit test setup functionality. 

The only code changes outside of the tests are some minor formatting fixes.